Dispersion Modelling-1

[techv]

A small query for dispersion modelling gurus.

There was a dispersion study carried out by Consultant for CO2 from Vent Gas in order to comply with occupational exposure of CO2. Wind Speed has been considered as 1 m/s as input to the model. Client asked to revise the modelling based on 'Design wind speed for atmoshperic dispersion at 5 m/s'. We are about ask the Consultant to look into the same.

Meanwhile I did refer to Gaussian dispersion equation where 'C' (ground level concentration) is inversely propotional to 'u' (downwind speed). From this, will I be correct to state that the 'C' would be 5 times lesser at 5 m/s than what it is at 1 m/s?

 

[SylvestreW]

I'm by no means an expert, but I'd suspect not. If I remember correctly, the sigma's are a function of wind speed; when the wind speed changes, different sigmas will have to be used. This will result in C being something else (i.e. not just 5 times less).

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Syl.